1.7/9=42/n,..n adalah 2.1 4/7-1/3= 3.4 5/9+2 6/n:3 1/3= 4.21%÷0,21×1/5=n, n adalah

jawabannya 1 - 4 maaf kalo salah

langsung aja y

1.
7/9 = 42/n
9n = 42×7
n = 294/9
n = 98/3
n = 32 ⅔

2.
1 4/7 - ⅓ = n
11/7 - ⅓ = n
33/21 - 7/21 = n
26/21 = n
1 5/21 = n

3.
4 5/9 + 2 6/n : 3 ⅓
41/9 + (2n+6)/n : 10/3
41/9 + (2n+6)/n × 3/10
41/9 + (6n+18)/10n
6n + 18 / 10n = -41 / 9
9(6n+18) = 10n(-41)
54n + 162 = - 410n
54n + 410n = - 162
464n = - 162
n = - 162/464
n = 81/232

4.
21℅ : 0,21 × 1/5 = n
21/100 : 21/100 × 1/5 = n
21/100 × 100/21 × 1/5 = n
1/5 = n

semoga berguna +_+